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 ###Instrução: Quantos voivodenships diferentes têm 747.900 cidadãos?
 ###Tabelas: CREATE TABLE 2004_nfl_draft (2004_nfl_draft_id AUTO_INCREMENT PRIMARY KEY, Round INT, Pick # INT, Overall INT, Name VARCHAR, Position VARCHAR, College VARCHAR) CREATE TABLE premier_division_final_table (premier_division_final_table_id AUTO_INCREMENT PRIMARY KEY, Position INT, Team VARCHAR, Played INT, Drawn INT, Lost INT, Goals For INT, Goals Against INT, Goal Difference VARCHAR, Points 1 VARCHAR) CREATE TABLE england_in_australia_1903_4 (england_in_australia_1903_4_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, Home captain VARCHAR, Away captain VARCHAR, Venue VARCHAR, Result VARCHAR) CREATE TABLE poland's_voivodeships_1975-98_49_voivodeships (poland's_voivodeships_1975-98_49_voivodeships_id AUTO_INCREMENT PRIMARY KEY, Abbreviation VARCHAR, Voivodeship VARCHAR, Capital VARCHAR, Area km² (1998) VARCHAR, Population (1980) VARCHAR, No. of cities INT, No. of communes INT) CREATE TABLE cfl_teams_with_one_or_no_wins_in_a_season_based_on_official_cfl_site (cfl_teams_with_one_or_no_wins_in_a_season_based_on_official_cfl_site_id AUTO_INCREMENT PRIMARY KEY, Season INT, Team VARCHAR, Games INT, Wins INT, Losses INT, Ties INT)  
SELECT COUNT Voivodeship FROM poland's_voivodeships_1975-98_49_voivodeships WHERE Population (1980) = 747 900